Device for detecting sealing performance of battery cell aluminum shell

Abstract

The utility model discloses a device for detecting the sealing performance of a battery cell aluminum shell, which comprises a main body bracket, the main body bracket is horizontally arranged, a height frame is vertically arranged on the main body bracket, and a cross frame is horizontally arranged at the top of the height frame; a sealing container and an air cylinder switch are installed on the main body support, liquid is contained in the sealing container, a power air cylinder is installed on the transverse frame, a cross beam is installed at the bottom end of the air cylinder, a battery cell is detachably installed at the bottom of the cross beam, and the air pressure switch is used for controlling the power air cylinder to drive the cross beam to ascend and descend. The power air cylinder can enable the battery cell to extend into the inner cavity of the sealed container to be soaked in liquid, the sealing performance of the battery cell can be observed in multiple directions through vision, and the pressure leakage amount can be calculated through the pressure gauge.

Description

Technical Field

[0001] The utility model relates to the technical field of battery core sealing detection, in particular to a device for detecting the sealing of a battery core aluminum shell. Background Art

[0002] Battery production is divided into battery cell manufacturing and PACK assembly. The two parts have one thing in common, which is putting electricity into a physical carrier, which is the battery cell shell. Therefore, the battery cell shell is the main body to complete manufacturing and assembly. The key technical issues of the main body are laser welding of the cover, sealing of the filling port, and whether the edge of the pole and the shell are bumped and deformed. Once the battery cell shell has quality problems, it will cause leakage, short circuit and other hidden dangers, which will naturally affect the safety threat of the whole vehicle. Therefore, the battery cell aluminum shell inspection work is very important. Utility Model Content

[0003] In order to solve the technical problems existing in the background technology, the utility model provides a device for detecting the sealing performance of an aluminum shell of a battery core.

[0004] The utility model provides a device for detecting the sealing of an aluminum shell of a battery core, comprising a main body bracket, the main body bracket is placed horizontally, a height frame is vertically installed on the main body bracket, and a cross frame is horizontally installed on the top of the height frame;

[0005] A sealed container and a cylinder switch are installed on the main body bracket, the sealed container is filled with liquid, a power cylinder is installed on the cross frame, a crossbeam is installed at the bottom end of the cylinder, and a battery cell is detachably installed at the bottom of the crossbeam. The cylinder switch is used to control the power cylinder to drive the crossbeam to rise and fall, and the power cylinder can extend the battery cell into the inner cavity of the sealed container and immerse it in the liquid.

[0006] Preferably, sealing covers are sealingly and rotatably connected to both sides of the top of the sealed container, and a through hole is provided at the junction of the two sets of sealing covers for clamping the ejector rod of the power cylinder, and a sealing gasket is installed on the inner wall of the through hole.

[0007] Preferably, the side wall of the sealed container is provided with an observation window.

[0008] Preferably, a pressure gauge is installed on the side of the sealed container, and a pressure connecting pipe is installed on the bottom.

[0009] Preferably, a supporting foot is installed at the bottom of the main frame, and an anti-slip pad is installed at the bottom of the supporting foot.

[0010] Preferably, a plurality of groups of positioning blocks are installed on the main frame for positioning the sealed container.

[0011] Preferably, a plurality of sets of fixing frames are installed at the bottom of the crossbeam, the fixing frames are used to position the battery cells, injection nozzles are installed on the side walls of the battery cells, and two sets of extrusion clamps are provided at the bottom of the crossbeam for positioning the two ends of the battery cells.

[0012] Preferably, the two groups of extrusion clamps are divided into extrusion clamp a and extrusion clamp b, the extrusion clamp a is fixedly installed at one end of the bottom of the beam, and the extrusion clamp b is slidably connected to the other end of the bottom of the beam.

[0013] Preferably, a screw rod is provided on the cross beam, and the extrusion clamp b is threadedly connected to the screw rod, and the screw rod has a portion extending out of the cross beam, and the portion is fixedly connected to a tightening knob.

[0014] In the present utility model, the beneficial effects of the present utility model are:

[0015] This device uses a supporting frame in the middle of the battery cell to fix the battery cell, and clamps on both sides to press the battery cell pole and the liquid injection port to inject air pressure into the aluminum shell; the battery cell is placed in a sealed container, and the sealing of the battery cell can be observed from multiple angles visually, and the leakage pressure can also be calculated using a pressure gauge.

[0016] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of a device for detecting the sealing of the aluminum shell of a battery cell;

[0018] Figure 2 This is a schematic diagram of the structure of a main support and a height frame in a device for detecting the sealing of an aluminum shell of a battery cell;

[0019] Figure 3 A schematic diagram of the lifting and lowering of a device for detecting the sealing of an aluminum shell of a battery cell;

[0020] Figure 4 A schematic diagram of a sealed container for testing the sealing performance of an aluminum shell of a battery cell;

[0021] Figure 5 A schematic diagram of a fixture for detecting the sealing of an aluminum shell of a battery cell;

[0022] Explanation of the numbers in the figure: 1. Main bracket; 2. Cylinder switch; 3. Anti-slip foot pad; 4. Pressurization pipe; 5. Sealed container; 6. Observation window; 7. Pressure gauge; 8. Liquid; 10. Sealing cover; 11. Sealing pad; 12. Height frame; 13. Injection nozzle; 14. Fixed frame; 15. Battery cell; 16. Power cylinder; 17. Crossbeam; 18. Tightening knob; 19. Extrusion clamp. DETAILED DESCRIPTION

[0023] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar symbols throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0024] like Figure 1-Figure 5 The device shown in the figure for detecting the sealing property of the aluminum shell of a battery cell comprises a main frame 1, the main frame 1 is placed horizontally, a height frame 12 is vertically installed on the main frame 1, and a cross frame is horizontally installed on the top of the height frame 12;

[0025] A sealed container 5 and a cylinder switch 2 are installed on the main frame 1, and the sealed container 5 is filled with liquid 8. A power cylinder 16 is installed on the cross frame, and a cross beam 17 is installed at the bottom end of the cylinder. A battery cell 15 is detachably installed at the bottom of the cross beam 17. The cylinder switch 2 is used to control the power cylinder 16 to drive the cross beam 17 to rise and fall. The power cylinder 16 can extend the battery cell 15 into the inner cavity of the sealed container 5 and immerse it in the liquid 8.

[0026] Preferably, sealing covers 10 are sealingly and rotatably connected to both sides of the top of the sealed container 5, and a through hole is opened at the junction of the two sets of sealing covers 10 for clamping the ejector rod of the power cylinder 16, and a sealing gasket 11 is installed on the inner wall of the through hole.

[0027] Preferably, a side wall of the sealed container 5 is provided with an observation window 6 .

[0028] Preferably, a pressure gauge 7 is installed on the side of the sealed container 5, and a pressure pipe 4 is installed on the bottom thereof.

[0029] Preferably, a support foot is installed at the bottom of the main frame 1, and an anti-slip pad 3 is installed at the bottom of the support foot.

[0030] Preferably, a plurality of positioning blocks are installed on the main frame 1 for positioning the sealed container 5 .

[0031] Preferably, a plurality of sets of fixing frames 14 are installed at the bottom of the cross beam 17, and the fixing frames 14 are used to position the battery cells 15. The side walls of the battery cells 15 are installed with injection nozzles 13. Two sets of extrusion clamps 19 are provided at the bottom of the cross beam 17 for positioning the two ends of the battery cells 15. The injection nozzles 13 can accurately inject gas into the aluminum shell through the pressure pipe.

[0032] Preferably, the two groups of extrusion clamps 19 are divided into extrusion clamp a and extrusion clamp b. The extrusion clamp a is fixedly installed at one end of the bottom of the beam 17 , and the extrusion clamp b is slidably connected to the other end of the bottom of the beam 17 .

[0033] Preferably, a screw rod is provided on the cross beam 17 , and the extrusion clamp b is threadedly connected to the screw rod. The screw rod has a portion extending out of the cross beam 17 , and the portion is fixedly connected to a clamping knob 18 .

[0034] The battery cell 15 is fixed by a fixture, and the fixing frame 14 is used to position the battery cell 15. The squeezing clamps 19 on both sides of the battery cell 15 position the battery cell 15 on both sides. The pressing knob 18 is turned to drive the screw to rotate, thereby adjusting the position of the squeezing clamp 19, and the positioning can be adjusted according to the battery cells 15 of different sizes.

[0035] The power cylinder 16 can be used to easily move the battery cell 15 up and down, and can effectively fix the battery cell 15. The battery cell 15 is placed in the liquid 8 of the sealed container 5. The high-pressure sealed container 5 and the liquid 8 can visually observe and detect the sealing of the aluminum shell of the battery cell 15.

[0036] The main function is to detect whether there is leakage at the injection port and the welding edge of the cover plate after the aluminum shell of the battery cell 15 is formed by laser welding. The working principle is to pressurize the gas into the aluminum shell of the battery cell 15 through the tooling pipeline, and then put the battery cell 15 into the liquid 8 of the sealed container 5. The observation window 6 can be used to visually detect whether bubbles are generated in the entire battery cell 15, and the specific location of the damage can be determined by the position of the bubbles, and the size of the damage can be estimated by the number of bubbles. There is a pressure gauge on the side, which can calculate the specific data of poor sealing. Through this device, the quality department can be effectively assisted to detect the type of poor sealing of the aluminum shell of the battery cell 15, identify the type of problem in the spot check of incoming materials and after the welding of the battery cell 15, find the source of the problem, and further improve the detection efficiency, thereby reducing the problems such as leakage and corrosion of the battery cell 15.

[0037] It should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0038] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0039] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0041] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A device for detecting the sealing of a battery core aluminum shell, characterized in that: It comprises a main frame (1), the main frame (1) is placed horizontally, a height frame (12) is vertically mounted on the main frame (1), and a cross frame is horizontally mounted on the top of the height frame (12); The main frame (1) is provided with a sealed container (5) and a cylinder switch (2). The sealed container (5) is filled with liquid (8). The cross frame is provided with a power cylinder (16). The bottom end of the cylinder is provided with a cross beam (17). The bottom of the cross beam (17) is provided with a battery cell (15) detachably mounted thereon. The cylinder switch (2) is used to control the power cylinder (16) to drive the cross beam (17) to rise and fall. The power cylinder (16) can extend the battery cell (15) into the inner cavity of the sealed container (5) to immerse it in the liquid (8).

2. A device for detecting the sealing performance of an aluminum shell of a battery cell according to claim 1, characterized in that: The top two sides of the sealed container (5) are sealed and rotatably connected with sealing covers (10), and a through hole is provided at the intersection of the two sets of sealing covers (10) for clamping the ejector rod of the power cylinder (16), and a sealing gasket (11) is installed on the inner wall of the through hole.

3. The device for detecting the sealing performance of the aluminum shell of a battery cell according to claim 1, characterized in that: The side wall of the sealed container (5) is provided with an observation window (6).

4. The device for detecting the sealing performance of the aluminum shell of a battery cell according to claim 1, characterized in that: A pressure gauge (7) is installed on the side of the sealed container (5), and a pressure pipe (4) is installed on the bottom of the sealed container.

5. The device for detecting the sealing performance of the aluminum shell of a battery cell according to claim 1, characterized in that: A support foot is installed at the bottom of the main frame (1), and an anti-skid pad (3) is installed at the bottom of the support foot.

6. The device for detecting the sealing performance of the aluminum shell of a battery cell according to claim 1, characterized in that: The main frame (1) is provided with a plurality of groups of positioning blocks for positioning the sealed container (5).

7. The device for detecting the sealing performance of the aluminum shell of a battery cell according to claim 1, characterized in that: A plurality of sets of fixing frames (14) are installed at the bottom of the crossbeam (17), and the fixing frames (14) are used to position the battery cell (15). The side wall of the battery cell (15) is installed with an injection nozzle (13). Two sets of extrusion clamps (19) are provided at the bottom of the crossbeam (17) to position the two ends of the battery cell (15).

8. The device for detecting the sealing performance of the aluminum shell of a battery cell according to claim 1, characterized in that: The two groups of extrusion clamps (19) are divided into extrusion clamp a and extrusion clamp b. The extrusion clamp a is fixedly installed at one end of the bottom of the crossbeam (17), and the extrusion clamp b is slidably connected to the other end of the bottom of the crossbeam (17).

9. The device for detecting the sealing performance of the aluminum shell of a battery cell according to claim 8, characterized in that: A screw rod is arranged on the cross beam (17), and the extrusion clamp b is threadedly connected to the screw rod. The screw rod has a portion extending out of the cross beam (17), and the portion is fixedly connected with a pressing knob (18).

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